q.22. the table shows the melting points and boiling points for different substances. identify the state of…
q.22. the table shows the melting points and boiling points for different substances. identify the state of given substances at room temperature (room temperature is around 20°c).
Answer
Explanation:
Step1: Analyze Water
For water, melting point is (0^{\circ}C) and boiling point is (100^{\circ}C). Room temperature (20^{\circ}C) is between (0^{\circ}C) and (100^{\circ}C). So water is in liquid state.
Step2: Analyze Oxygen
Oxygen has melting point (- 218^{\circ}C) and boiling point (-183^{\circ}C). Room temperature (20^{\circ}C> - 183^{\circ}C). So oxygen is in gas state.
Step3: Analyze Iron
Iron has melting point (1538^{\circ}C). Room temperature (20^{\circ}C<1538^{\circ}C). So iron is in solid state.
Step4: Analyze Sulfuric acid
Sulfuric acid has melting point (10.3^{\circ}C) and boiling point (337^{\circ}C). Room temperature (20^{\circ}C) is between (10.3^{\circ}C) and (337^{\circ}C). So sulfuric acid is in liquid state.
Step5: Analyze Magnesium
Magnesium has melting point (650^{\circ}C). Room temperature (20^{\circ}C<650^{\circ}C). So magnesium is in solid state.
Step6: Analyze Nitrogen
Nitrogen has melting point (-210^{\circ}C) and boiling point (-195^{\circ}C). Room temperature (20^{\circ}C> - 195^{\circ}C). So nitrogen is in gas state.
Answer:
| State at Room Temperature | |
|---|---|
| Water | liquid |
| Oxygen | gas |
| Iron | solid |
| Sulfuric acid | liquid |
| Magnesium | solid |
| Nitrogen | gas |